Mike,

My preference is to grow seedlings in upper 60s temps. The seedlings are off the heating mat as soon as they sprout.

When the seedling emerges I move the cell from the starting tray to another tray under lights. The lights are on a 16/8 on and off cycle. Granted, the lights do heat the green tops of the seedlings to somewhat warmer than the unheated room. Perhaps it is the 8 hours off that gives the sturdier plants.

Just my experience... individual results may vary. LOL

jt

I do what jt does.

john

i agree with jt and john
dan
let it burn

Thanks, for the response. That's what I thought of doing but didn't want to take the little guys out and have a mini-seedling rebellion LOL This was part of my logic for putting only one seed per cell this year as opposed to two or more.

You only need the heat to germinate the seed.

As soon as you can see green above the soil line you can remove the seedling from the the heat